Disc type permanent magnet coupler for billet clamping spreader

Abstract

The application discloses a disc type permanent magnet coupler for a billet clamping hoist, and relates to the technical field of shaft couplings.The disc type permanent magnet coupler comprises a first bearing seat and a second bearing seat, a composite conductor disc is connected to a first shaft, a permanent magnet disc assembly is connected to a second shaft, an electromagnetic coil assembly is arranged on the second bearing seat and used for driving an armature disc to move axially, the second shaft is circumferentially fixed with the permanent magnet assembly and is axially slidably connected with the permanent magnet assembly and is provided with an axial gap positioning, and the armature disc is bearing rotatably connected with the permanent magnet assembly.The technical scheme of the application can drive the permanent magnet disc assembly axially to adjust the axial relative positions between the permanent magnet disc assembly and the composite conductor disc, and finally obtain the maximum torque of the two kinds of fixation.

Description

Technical Field

[0001] This invention relates to the field of coupling technology, and more specifically to a disc-type permanent magnet coupler for a billet clamping and lifting device. Background Technology

[0002] Many steel mills in China still use traditional clamping-type billet lifting devices. These devices require frequent start-stop and reversal operations to clamp or release the billet. They operate via an imported magnetic powder clutch connected to a reducer, which in turn controls the clamping device. The magnetic powder clutch uses an electromagnetic field to control the magnetic powder and transmit torque by adjusting the current. However, magnetic powder clutches have several drawbacks: First, high maintenance costs, requiring regular replacement of magnetic powder and sealing elements, and the large quantity and high price of magnetic powder. Second, frequent equipment replacements, necessitating the purchase of new equipment every 2-3 magnetic powder replacements, with long lead times. Third, high operating temperatures, reaching up to 70°C, which can easily cause magnetic powder failure. To address these issues, this paper presents a disc-type permanent magnet coupler for billet clamping and lifting devices.

[0003] Current disc-type permanent magnet couplers are mechanical transmission devices that utilize magnetic fields for non-contact power transmission. For example, Chinese patent document CN102931807A discloses an inter-axial permanent magnet coupling mechanism with a coaxially arranged permanent magnet rotor and conductor rotor. The permanent magnet rotor has permanent magnets distributed on it, and the conductor rotor has conductors distributed on it. An air gap exists between the permanent magnet rotor and the conductor rotor. Furthermore, this mechanism also has an axial adjustment device that can adjust the air gap between the permanent magnet rotor and the conductor rotor, changing the interaction distance between them, thereby obtaining adjustable output torque and speed.

[0004] However, most disc-type permanent magnet couplers are specialized servo system devices that require axial adjustment. They can adjust the distance online in real time for speed regulation and other needs, but they have long axial dimensions and complex mechanisms. Summary of the Invention

[0005] In view of this, the present invention provides a disc-type permanent magnet coupler for a billet clamping lifting device to solve the problem of complex structure of existing axial adjustment servo systems.

[0006] The disc-type permanent magnet coupler for steel billet clamping and lifting devices provided by the present invention includes: First bearing housing and second bearing housing; The first shaft is rotatably connected to the first bearing seat, and a composite conductor disk is connected to the first shaft; The second shaft is rotatably connected to the second bearing housing, and a permanent disk assembly is connected to the second shaft. The first shaft and the second shaft are connected by a bearing. An axial adjustment device includes an axial drive and an armature disk, wherein the armature disk is slidably disposed along the first axis and the second axis, and the axial drive is used to drive the armature disk to move axially. The armature disk is rotatably connected to the permanent disk assembly, and there is an axial limiting structure between the armature disk and the permanent disk assembly. The second shaft is axially slidably connected to the permanent disk assembly, and there is a circumferential limiting structure between the second shaft and the permanent disk assembly. The permanent disk assembly has a first position on the second shaft that is close to the composite conductor disk, and a second position that is far away from the composite conductor disk. Alternatively, the armature disk and the composite conductor disk are rotatably connected, the armature disk and the composite conductor disk have an axial limiting structure, the first shaft and the composite conductor disk are axially slidingly connected, the first shaft and the composite conductor disk have a circumferential limiting structure, and the composite conductor disk has a first position on the first shaft that is close to the permanent disk assembly and a second position that is far away from the permanent disk assembly.

[0007] The technical solution of this invention has the following advantages: First, the permanent magnet disk assembly and the second shaft are configured as an axial sliding connection, and equipped with a circumferential limiting structure. In this way, when the permanent magnet disk assembly is driven axially, the circumferential transmission between the second shaft and the permanent magnet disk assembly is not affected, ensuring the normal operation of the second shaft. Simultaneously, the permanent magnet disk assembly and the armature disk are configured as a rotating connection, and an axial limiting structure is provided. This allows the permanent magnet disk assembly to be driven axially by the armature disk, thereby changing the axial position of the permanent magnet disk assembly. This, in turn, adjusts the axial relative position between the permanent magnet disk assembly and the composite conductor disk, ultimately obtaining adjustable output torque and speed without affecting the circumferential rotation of the permanent magnet disk assembly.

[0008] Secondly, if the composite conductor disk and the first shaft are configured with an axial sliding connection and a circumferential limiting structure, the circumferential transmission between the first shaft and the permanent magnet disk assembly can be maintained without interfering with the axial drive of the composite conductor disk, ensuring the normal operation of the first shaft. Alternatively, if the composite conductor disk and the armature disk are configured with a rotatable connection and an axial limiting structure is provided, the axial position of the composite conductor disk can be changed by axial drive of the composite conductor disk through the armature disk. This allows adjustment of the relative axial position between the permanent magnet disk assembly and the composite conductor disk, resulting in adjustable output torque and speed, without affecting the circumferential rotation of the composite conductor disk.

[0009] Optionally, the axial drive component is an electromagnetic drive device, and the armature disk is made of a magnetically conductive material. With this configuration, the existing control system can directly control the on / off state of the electromagnetic coil to directly generate two types of torque, and can also achieve a clutch function.

[0010] Optionally, the armature disk is slidably connected via guide members, which have a plurality of guide members evenly arranged circumferentially around the armature disk.

[0011] Optionally, the permanent magnet disk assembly includes: a permanent magnet rotor and a connecting sleeve, wherein the permanent magnet rotor and the connecting sleeve are detachably connected, and the connecting sleeve is rotatably connected to the armature disk.

[0012] Optionally, a portion of the connecting sleeve extends into the armature disk, and a space for accommodating the bearing is formed between the outer wall of the connecting sleeve and the inner wall of the armature disk. A first bearing end cap is detachably connected to the end of the connecting sleeve, and a second bearing end cap is detachably connected to the end of the armature disk. The first bearing end cap and the second bearing end cap respectively provide axial positioning for the bearing.

[0013] Optionally, the permanent magnet rotor includes a permanent magnet carrier disk and permanent magnets disposed on the permanent magnet carrier disk, wherein the permanent magnets have multiple pieces of N and S poles evenly and alternately arranged around the permanent magnet carrier disk in a circumferential direction.

[0014] Optionally, the permanent disk assembly is connected to the second axis via a spline structure; or, the composite conductor disk is connected to the first axis via a spline structure.

[0015] Optionally, the composite conductor disk includes a first conductor disk and a second conductor disk arranged in parallel. Relatively speaking, the first conductor disk is made of a high conductivity material, and the second conductor disk is made of a low conductivity material to form the composite conductor disk. With this arrangement, the high conductivity disk plays a major role when the slip is low, and the low conductivity disk plays a major role when the slip is high.

[0016] Optionally, the first conductor disk is provided with a plurality of through holes evenly distributed along the circumference, the second conductor disk is located on the side of the first conductor disk away from the permanent disk assembly, and a plurality of protrusions are connected to the second conductor disk, the protrusions being embedded in the through holes of the first conductor disk.

[0017] Optionally, the composite conductor disk includes a first conductor disk, on which a plurality of through holes are uniformly provided along the circumference, and protrusions are embedded in the through holes. Relatively speaking, the first conductor disk is made of a high conductivity material, and the protrusions are made of a low conductivity material. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a front sectional view of a disc-type permanent magnet coupler provided in an embodiment of the present invention; Figure 2 for Figure 1 The front view of the first shaft and the composite conductor disk in the disc-type permanent magnet coupler shown; Figure 3 for Figure 2 A three-dimensional view of the first conductor disk in the composite conductor disk; Figure 4 for Figure 2 A three-dimensional view of the second conductor disk in the composite conductor disk; Figure 5 for Figure 1 The front view of the armature disk and permanent magnet disk assembly in the disc-type permanent magnet coupler shown; Figure 6 for Figure 5 Main view of Zhongyong disk component; Figure 7 for Figure 6 Right view of the permanent magnet rotor; Figure 8 for Figure 7 A three-dimensional view of the permanent magnet carrier disk; Figure 9 for Figure 1 A three-dimensional view of the second axis in the disc-type permanent magnet coupler shown; Figure 10 for Figure 1 The diagram shows a disc-type permanent magnet coupler transmitting minimum torque. Figure 11 for Figure 10 The diagram shown illustrates the addition of torque transmission to the disc-type permanent magnet coupler. Figure 12 This is a schematic diagram of another disc-type permanent magnet coupler provided in an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures 1. First bearing housing; 2. Second bearing housing; 3. First shaft; 4. Second shaft; 401. Key tooth; 5. Composite conductor disk; 501. First conductor disk; 502. Second conductor disk; 503. Protruding post; 6. Permanent magnet disk assembly; 601. Permanent magnet rotor; 6011. Permanent magnet carrier disk; 6012. Permanent magnet; 602. Connecting sleeve; 7. Axial drive component; 8. Armature disc; 9. Guide component; 11. First bearing end cover; 12. Second bearing end cover. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Reference Figure 1 As shown, this is a specific implementation of the disc-type permanent magnet coupler provided in this embodiment, including: a first bearing seat 1 and a second bearing seat 2, a first shaft 3 is rotatably connected to the first bearing seat 1, and a second shaft 4 is rotatably connected to the second bearing seat 2.

[0026] Reference Figure 1 As shown, a composite conductor disk 5 is connected to the first axis 3, and a permanent disk assembly 6 is connected to the second axis 4. The permanent disk assembly 6 and the composite conductor disk 5 are parallel and spaced apart from each other.

[0027] Reference Figure 1As shown, it also includes: an axial adjustment device, which has an axial drive 7 and an armature disk 8. The armature disk 8 is slidably disposed along the axial direction of the first shaft 3 and the second shaft 4, and is driven to move axially by the axial drive 7. The second shaft 4 is axially slidably connected to the permanent disk assembly 6, and a circumferential limiting structure is provided between the second shaft 4 and the permanent disk assembly 6; the armature disk 8 is rotatably connected to the permanent disk assembly 6, and an axial limiting structure is provided between the armature disk 8 and the permanent disk assembly 6.

[0028] The permanent magnet disk assembly 6 has a first position close to the composite conductor disk 5 and a second position far away from the composite conductor disk 5 on the second axis 4. When the permanent magnet disk assembly 6 is in the first position, the distance between it and the composite conductor disk 5 is relatively small, allowing it to transmit a larger torque; when the permanent magnet disk assembly 6 is in the second position, the distance between it and the composite conductor disk 5 is relatively large, allowing it to transmit a smaller torque.

[0029] The technical solution of this invention sets the permanent magnet disk assembly 6 and the second shaft 4 in an axial sliding connection and equips them with a circumferential limiting structure. In this way, when the permanent magnet disk assembly 6 is driven axially, the circumferential transmission between the second shaft 4 and the permanent magnet disk assembly 6 is not affected, ensuring the normal operation of the second shaft 4. Simultaneously, the permanent magnet disk assembly 6 and the armature disk 8 are set in a rotatable connection and equipped with an axial limiting structure. This allows the permanent magnet disk assembly 6 to be driven axially via the armature disk 8, thereby changing the axial position of the permanent magnet disk assembly 6 and adjusting the relative axial position between the permanent magnet disk assembly 6 and the composite conductor disk 5. Ultimately, this achieves adjustable output torque and speed without affecting the circumferential rotation of the permanent magnet disk assembly 6.

[0030] like Figure 12 As shown, in some alternative embodiments, the first shaft 3 is axially slidably connected to the composite conductor disk 5, and the first shaft 3 and the composite conductor disk 5 have a circumferential limiting structure; the armature disk 8 is rotatably connected to the composite conductor disk 5, and the armature disk 8 and the composite conductor disk 5 have an axial limiting structure.

[0031] The composite conductor disk 5 has a first position on the first axis 3, close to the permanent disk assembly 6, and a second position, far from the permanent disk assembly 6. When the composite conductor disk 5 is in the first position, the distance between it and the permanent disk assembly 6 is relatively small, allowing it to transmit a larger torque; when the composite conductor disk 5 is in the second position, the distance between it and the permanent disk assembly 6 is relatively large, allowing it to transmit a smaller torque.

[0032] In this design, the composite conductor disk 5 and the first shaft 3 are axially slidingly connected, and a circumferential limiting structure is provided. This ensures that the circumferential transmission between the first shaft 3 and the composite conductor disk 5 is not interfered with when the composite conductor disk 5 is axially driven, thus guaranteeing the normal operation of the first shaft 3. Furthermore, the composite conductor disk 5 and the armature disk 8 are rotatably connected, and an axial limiting structure is also provided. Axially driving the composite conductor disk 5 through the armature disk 8 changes the axial position of the composite conductor disk 5, thereby adjusting the relative axial position between the permanent magnet disk assembly 6 and the composite conductor disk 5. This achieves adjustable output torque and speed, without affecting the circumferential rotation of the composite conductor disk 5.

[0033] Electromagnetic induction regulation principle: The disc-type permanent magnet coupler operates based on the principle of electromagnetic induction. The permanent magnet disk assembly 6 generates a constant magnetic field. The composite conductor disk 5 cuts magnetic lines of force in the magnetic field, generating an induced current. This induced current then generates a magnetic field that interacts with the magnetic field of the permanent magnet disk assembly 6, thereby producing torque and achieving transmission. When the axial distance between the permanent magnet disk assembly 6 and the composite conductor disk 5 changes, the magnetic field coupling strength changes according to the relationship between magnetic field strength and distance, the magnitude of the induced current changes, and thus the output torque and speed are regulated.

[0034] Reference Figure 1 As shown, in some embodiments, the axial drive component 7 is an electromagnetic drive device, and the armature disk 8 is made of a magnetically conductive material, such as carbon steel or iron. When the electromagnetic drive device is energized, it can generate an attractive force on the armature disk 8. The electromagnetic coil can be fixed in the annular groove of the second bearing seat 2, and the armature disk 8 is arranged around the second shaft 4. The armature disk 8 drives the permanent magnet disk assembly 6 or the composite conductor disk 5 axially, thereby enabling the permanent magnet disk assembly 6 and the composite conductor disk 5 to move closer or further apart.

[0035] Furthermore, the electromagnetic coils are evenly arranged around the second bearing seat 2 circumferentially, ensuring a uniform distribution of the electromagnetic force generated by the electromagnetic drive device in the circumferential direction. This guarantees that the driving force on the armature disk 8 is consistent in all directions during axial movement, preventing tilting or jamming of the armature disk 8 due to uneven force distribution. This ensures that the permanent magnet disk assembly 6 can move smoothly and steadily in the axial direction, further guaranteeing the stability of output torque and speed regulation. Taking the transmission system of large mechanical equipment as an example, if the permanent magnet disk assembly 6 does not move smoothly, it may cause equipment vibration. This uniform driving force can effectively avoid such problems and extend the service life of the equipment.

[0036] Of course, the above description is not limiting, and in some alternative embodiments, other axial drive components 7 may be used. For example, electric screw drive, pneumatic drive, or hydraulic drive may be used.

[0037] Reference Figure 1As shown, in some embodiments, the armature disk 8 is slidably connected to the second bearing seat 2 via guide members 9, which are multiple members evenly arranged circumferentially around the armature disk 8. Specifically, the guide members 9 can be structures such as guide rails or guide rods. Taking a guide rail as an example, a slider matching the guide rail is provided on the armature disk 8, and the slider and the guide rail are in contact through a high-precision mating surface. When the armature disk 8 is subjected to axial driving force, the slider slides on the guide rail. Due to the shape and precision limitations of the guide rail, the slider can only move along the axial direction of the guide rail, thereby achieving the guiding effect on the armature disk 8. The multiple guide members 9 are evenly arranged circumferentially around the second bearing seat 2, just like setting tracks for the armature disk 8 in multiple directions, so that the armature disk 8 is constrained in all directions and can only move in a straight line along the axial direction.

[0038] In the above scheme, the guide member 9 provides precise guidance for the axial movement of the armature disk 8, ensuring that it moves strictly along the axial direction and avoiding deviation or wobbling. Multiple guide members 9 are evenly arranged circumferentially around the second bearing seat 2, constraining the armature disk 8 from multiple directions, further guaranteeing the straightness and stability of the armature disk 8 during movement. When the disc-type permanent magnet coupler is working, this stable axial movement is crucial for maintaining a stable axial relative position between the permanent magnet disk assembly 6 and the composite conductor disk 5, effectively preventing fluctuations in output torque and speed caused by unstable movement of the armature disk 8.

[0039] Reference Figure 2 As shown, in some embodiments, the composite conductor disk 5 includes a first conductor disk 501 and a second conductor disk 502 arranged side by side. Relatively speaking, the first conductor disk 501 is made of a high conductivity material, and the second conductor disk 502 is made of a low conductivity material. Specifically, the first conductor disk 501 may be made of copper, and the second conductor disk 502 may be made of iron.

[0040] By setting the first conductor disk 501 and the second conductor disk 502 with different conductivity, the different characteristics of the two conductor disks in the electromagnetic induction process during slip changes can be utilized to achieve torque stability under different slips. The first conductor disk 501 with high conductivity (such as copper) can quickly generate a large induced current under the action of the magnetic field generated by cutting the permanent magnet coupling assembly 6, while the second conductor disk 502 with low conductivity (such as iron) basically does not participate in the induction, and the high conductivity generates a large electromagnetic torque. The second conductor disk 502 with low conductivity (such as iron) can only output electromagnetic torque under large slip. The purpose of this setting is to ensure that the permanent magnet coupler can still transmit sufficient torque throughout the entire slip range.

[0041] Reference Figure 3 , Figure 4As shown, in some embodiments, the first conductor disk 501 is provided with a plurality of through holes evenly distributed along the circumference, the second conductor disk 502 is located on the side of the first conductor disk 501 away from the permanent disk assembly 6, and a plurality of protrusions 503 are connected to the second conductor disk 502, the protrusions 503 extending toward the first conductor disk 501 and inserted into the through holes of the first conductor disk 501.

[0042] The above scheme, on the one hand, involves the uniformly arranged through holes along the circumference of the first conductor disk 501 cooperating with the corresponding protrusions 503 on the second conductor disk 502, with the protrusions 503 inserted into the through holes. This connection method provides strong constraint on the two conductor disks in both the axial and circumferential directions. On the other hand, because the protrusions 503 are inserted into the through holes of the first conductor disk 501, the conductor distribution inside the composite conductor disk 5 is altered. This structural change affects the magnetic field distribution generated by the permanent magnet disk assembly 6, making the magnetic field distribution within the composite conductor disk 5 more uniform and rational.

[0043] During assembly, the number of protrusions 503 can be adjusted according to actual needs to finely regulate the magnetic field distribution within the composite conductor disk 5. Inserting a protrusion 503 into the through-hole of the first conductor disk 501 alters the magnetic field path; different numbers of protrusions 503 result in varying degrees of change in the guidance and distribution of the magnetic field. In applications requiring enhanced electromagnetic coupling, appropriately increasing the number of protrusions 503 allows for a denser and more uniform magnetic field distribution within the conductor disk, enhancing torque transmission capability. Conversely, in situations where magnetic field strength requirements are relatively low, reducing the number of protrusions 503 avoids excessive magnetic field concentration, prevents localized overheating, and maintains the good electromagnetic performance of the composite conductor disk 5.

[0044] Reference Figure 5 , Figure 6 As shown, in some embodiments, the permanent magnet disk assembly 6 includes a permanent magnet rotor 601 and a connecting sleeve 602. The permanent magnet rotor 601 and the connecting sleeve 602 are detachably connected, and the connecting sleeve 602 is rotatably connected to the armature disk 8. The connecting sleeve 602 may be made of iron. The detachable connection between the permanent magnet rotor 601 and the connecting sleeve 602 greatly facilitates equipment maintenance and parts replacement. During long-term operation of the disk-type permanent magnet coupler, the permanent magnet rotor 601 may experience performance degradation due to various reasons (such as magnetic decay, physical damage, etc.). In this case, the detachable connection allows the permanent magnet rotor 601 to be easily separated from the connecting sleeve 602 for individual inspection, repair, or replacement.

[0045] Of course, the above description is not limiting. In some alternative embodiments, the permanent disk assembly 6 may also be integrally formed.

[0046] Reference Figure 5In some embodiments, a portion of the connecting sleeve 602 extends into the armature disk 8 of the axial adjustment device, and a space for accommodating the bearing is formed between the outer wall of the connecting sleeve 602 and the inner wall of the armature disk 8. A first bearing end cap 11 is detachably connected to the end of the connecting sleeve 602, and a second bearing end cap 12 is detachably connected to the end of the armature disk 8. The first bearing end cap 11 and the second bearing end cap 12 respectively limit the axial movement of the bearing.

[0047] In the above solution, by providing a space between the outer wall of the connecting sleeve 602 and the inner wall of the armature disk 8 to accommodate the bearing, and by using the first bearing end cap 11 and the second bearing end cap 12 to axially limit the bearing, stable support can be provided for the relative rotation between the connecting sleeve 602 and the armature disk 8. The bearing can reduce the frictional resistance between the two, allowing the connecting sleeve 602 to rotate smoothly within the armature disk 8, avoiding vibration and noise caused by excessive friction or uneven rotation.

[0048] The connecting sleeve 602 is detachably connected to the first bearing end cover 11, and the armature disc 8 is detachably connected to the second bearing end cover 12. This design makes it very convenient to maintain, inspect, or replace the bearing. When the bearing is worn or damaged, the bearing can be easily removed for repair or replacement simply by removing the corresponding end cover.

[0049] Reference Figure 5 As shown, in some embodiments, within the space for accommodating the bearing formed between the outer wall of the connecting sleeve 602 and the inner wall of the armature disk 8 of the axial adjustment device, steps for axially abutting the bearing are formed on both the outer wall of the connecting sleeve 602 and the inner wall of the armature disk 8. Specifically, the step on the connecting sleeve 602 is opposite to the first bearing end cap 11, and the step on the armature disk 8 is opposite to the second bearing end cap 12.

[0050] This design, with steps on the outer wall of the connecting sleeve 602 and the inner wall of the armature disk 8 to abut against the bearings, works in conjunction with the first and second bearing end caps 12 to further strengthen the axial restraint of the bearings. Compared to relying solely on end cap restraint, this structural design provides a more stable and reliable constraint on the bearings in the axial direction. During the operation of the disc-type permanent magnet coupler, it effectively prevents the bearings from shifting due to axial forces, ensuring the stability of the relative rotation between the permanent magnet disk assembly 6 and the armature disk 8, thereby guaranteeing the accuracy of torque transmission and the reliability of equipment operation.

[0051] Reference Figure 7 , Figure 8As shown, in some embodiments, the permanent magnet rotor 601 includes a permanent magnet carrier disk 6011 and permanent magnets 6012 disposed on the permanent magnet carrier disk 6011, wherein the permanent magnets 6012 have multiple pieces uniformly arranged circumferentially around the permanent magnet carrier disk 6011.

[0052] In the above scheme, permanent magnets 6012 are uniformly arranged circumferentially around the permanent magnet carrier disk 6011, generating a relatively uniform magnetic field around the permanent magnet rotor 601. Since the magnetic field contribution of each permanent magnet 6012 is uniformly superimposed in the circumferential direction, the magnetic field density cut by the composite conductor disk 5 at various positions is relatively consistent during rotation. This is crucial for the stable torque transmission of the disk-type permanent magnet coupler. In practical applications, in motor drive systems, a uniform magnetic field distribution ensures smooth motor output torque, avoids torque fluctuations caused by uneven magnetic fields, and thus makes the motor-driven equipment operate more stably, reducing vibration and noise.

[0053] In this embodiment, multiple permanent magnets 6012 work together, each generating a magnetic field of a certain intensity. These magnetic fields superimpose to form a stronger composite magnetic field around the permanent magnet carrier disk 6011. A stronger magnetic field means that the composite conductor disk 5 can generate a larger induced current when cutting magnetic lines of force. According to the principle of electromagnetic induction, the electromagnetic torque generated by the interaction between the induced current and the magnetic field will also increase. Therefore, this design can improve the torque transmission capability of the disk-type permanent magnet coupler, enabling it to drive devices with larger loads.

[0054] Magnetic field superposition principle: According to the principles of electromagnetism, the magnetic field generated by the permanent magnet 6012 is a vector field. When multiple permanent magnets 6012 are uniformly arranged around the permanent magnet carrier disk 6011, their magnetic fields are superimposed in space. Within the space surrounding the permanent magnet carrier disk 6011, the magnetic field vectors of each permanent magnet 6012 are synthesized according to the parallelogram law. Because the permanent magnets 6012 are uniformly distributed, the synthesized magnetic field is relatively uniformly distributed in the circumferential direction, resulting in a small change in magnetic field strength experienced by the composite conductor disk 5 when it cuts magnetic lines of force at different positions, thereby achieving uniform torque transmission.

[0055] In some embodiments, the permanent magnet carrier disk 6011 used to mount the permanent magnet 6012 is made of a magnetic shielding material, specifically stainless steel. As a magnetic shielding material, the permanent magnet carrier disk 6011 effectively limits the diffusion of the magnetic field of the permanent magnet 6012 in unnecessary directions, allowing the magnetic field to act more concentratedly on the composite conductor disk 5, thereby reducing magnetic field loss and heat generation. On the other hand, an electromagnetic coil is provided on the side of the permanent magnet carrier disk 6011 away from the permanent magnet 6012. By making the permanent magnet carrier disk 6011 a magnetic shielding material, interference with the permanent magnet 6012 during operation of the electromagnetic coil can be avoided.

[0056] Reference Figure 9 As shown, in some embodiments, the permanent magnet disk assembly 6 and the second shaft 4 are connected via a spline structure. The spline structure has multiple key teeth 401, and compared to a conventional single-key connection, the contact area between the spline key teeth 401 and the keyway is larger. When transmitting torque between the permanent magnet disk assembly 6 and the second shaft 4, the larger contact area can withstand greater shear force, thereby more efficiently transmitting the torque generated by the permanent magnet disk assembly 6 to the second shaft 4. This allows the disk-type permanent magnet coupler to reliably transmit large torques when driving loads, meeting the power transmission requirements under various working conditions. In heavy machinery and equipment in industrial production, enormous torque needs to be transmitted to drive the equipment; the spline connection structure ensures stable power transmission and guarantees normal equipment operation.

[0057] The spline connection provides both circumferential fixation and torque transmission, while also offering excellent axial guidance. In this embodiment, when the armature disk 8 drives the permanent magnet disk assembly 6 to move axially, the spline structure guides the assembly to move smoothly along the second shaft 4, ensuring the straightness and stability of the movement. Furthermore, the spline connection allows the permanent magnet disk assembly 6 to move axially within a certain range. This aligns with the function of adjusting the output torque and speed in a disc-type permanent magnet coupler by adjusting the axial distance between the permanent magnet disk assembly 6 and the composite conductor disk 5, providing a structural basis for achieving this adjustment function.

[0058] Of course, the above description is not limiting; in some alternative implementations, a pin connection may also be used.

[0059] Reference Figure 1 As shown, in some embodiments, the ends of the first shaft 3 and the second shaft 4 are connected by a bearing. Specifically, a bearing can be fitted onto the end of the first shaft 3, and the end of the second shaft 4 has a mounting groove. The outer ring of the bearing fitted onto the first shaft 3 is tightly fitted with the inner wall of the mounting groove. This arrangement effectively limits the relative displacement between the first shaft 3 and the second shaft 4 in the radial and axial directions. During rotation, this tight fit ensures that the two shafts always maintain a precise relative position, reducing vibration and sway, and greatly improving the rotational stability of the first shaft 3 and the second shaft 4.

[0060] It should be noted that in this embodiment, the tight fit between the outer ring of the bearing on the first shaft 3 and the inner wall of the mounting groove on the second shaft 4 is based on the principle of interference fit. In an interference fit, the outer diameter of the bearing outer ring is slightly larger than the inner diameter of the mounting groove on the second shaft 4. The bearing is installed in place using a specific assembly process (such as heating the mounting groove or cooling the bearing). After installation, due to the elastic recovery of the material, the inner wall of the mounting groove exerts radial pressure on the bearing outer ring, causing the two to fit tightly together. This tight fit effectively limits the relative radial displacement of the two shafts, providing stable support and ensuring rotational stability.

[0061] The working principle of the technical solution provided in this embodiment: Reference Figure 10 As shown, when the electromagnetic coil of the axial drive component 7 is energized, electromagnetic induction is generated, which in turn produces an axial attraction force. This attraction force is greater than the axial force generated by the permanent magnet rotor 601 and other frictional forces. The magnetic field generated by the electromagnetic coil couples with the armature disk 8 of the axial adjustment device. The permanent magnet disk assembly 6 follows the adjustment device along the guide 9, moving axially to the left as a whole until the attraction distance φ1 equals 0 and the coupling air gap φ2 reaches its maximum value, forming a clamping torque. At this time, the motor rotates, driving the composite conductor disk 5 to rotate, which in turn drives the permanent magnet rotor 601 to rotate, and then drives the second shaft 4 to rotate through the spline connection. At this time, the transmitted torque reaches its minimum value. This minimum value is the rated torque. When the load torque exceeds the rated torque, the overload slippage protection will be activated to prevent damage to the reducer and other loads connected after the second shaft 4.

[0062] When applied to billet clamping and lifting fixtures, during clamping, holding, and lifting, the jaws contact the billet and amplify force through self-locking via the inclined slider on the jaws. After clamping is complete, the motor is de-energized, the brake engages, and the second shaft 4 decelerates, thereby driving the permanent magnet rotor 601 to decelerate, i.e., slippage occurs between the permanent magnet rotor 601 and the drive rotor assembly. Through design, the disc coupler can still transmit the rated or set torque even at high slippage during slippage.

[0063] Reference Figure 11 As shown, when the electromagnetic coil of the axial drive component 7 is de-energized, the electromagnetic attraction disappears. At this time, the axial force generated by the permanent magnet rotor 601 is greater than the attraction generated by the electromagnetic coil. Under the action of the axial force of the permanent magnet rotor 601, the permanent magnet disk assembly 6 moves axially to the right along the guide rod until the engagement distance φ3 equals 0 and the coupling air gap φ2 reaches its minimum value, forming a release torque. At this time, the motor rotates, driving the composite conductor disk 5 to rotate, and then driving the permanent magnet rotor 601 to rotate, which in turn drives the second shaft 4 to rotate through the spline connection. At this time, the transmitted torque reaches its maximum value. When applied to billet clamping and lifting devices, this maximum value is greater than the preload generated by the self-locking force amplification and other frictional forces, thereby releasing the jaws and completing the release action.

[0064] When the disc-type permanent magnet coupler provided in this embodiment is applied to a billet clamping and lifting device, the billet clamping and lifting device includes: a jaw, which is driven by the second shaft 4 of the disc-type permanent magnet coupler. When the jaw contacts the billet, the clamping is completed by the self-locking force amplification of the inclined slider on the jaw. A brake is connected to the second shaft 4 of the disc-type permanent magnet coupler. When the brake is engaged, the second shaft 4 decelerates, thereby driving the permanent magnet disk assembly 6 to decelerate. The first shaft, driven by a motor, causes the composite conductor disk 5 to slip between the permanent magnet disk assembly 6. By design, the disc coupler can still transmit the rated or set torque under high slip when slipping.

[0065] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. A disc-type permanent magnet coupler for clamping and lifting steel billets, characterized in that, include: First bearing housing (1) and second bearing housing (2); The first shaft (3) is rotatably connected to the first bearing seat (1), and a composite conductor disk (5) is connected to the first shaft (3). The second shaft (4) is rotatably connected to the second bearing seat (2), and a permanent disk assembly (6) is connected to the second shaft (4). The first shaft (3) and the second shaft (4) are connected by a bearing. An axial adjustment device has an axial drive (7) and an armature disk (8), wherein the armature disk (8) is slidably disposed along the axial direction of the first shaft (3) and the second shaft (4), and the axial drive (7) is used to drive the armature disk (8) to move axially. The armature disk (8) is rotatably connected to the permanent disk assembly (6), and there is an axial limiting structure between the armature disk (8) and the permanent disk assembly (6). The second shaft (4) is axially slidably connected to the permanent disk assembly (6), and there is a circumferential limiting structure between the second shaft (4) and the permanent disk assembly (6). The permanent disk assembly (6) has a first position on the second shaft (4) close to the composite conductor disk (5) and a second position away from the composite conductor disk (5). Alternatively, the armature disk (8) is rotatably connected to the composite conductor disk (5), the armature disk (8) and the composite conductor disk (5) have an axial limiting structure, the first shaft (3) and the composite conductor disk (5) are axially slidingly connected, the first shaft (3) and the composite conductor disk (5) have a circumferential limiting structure, and the composite conductor disk (5) has a first position on the first shaft (3) close to the permanent disk assembly (6) and a second position away from the permanent disk assembly (6).

2. The disc-type permanent magnet coupler for a billet clamping and lifting device according to claim 1, characterized in that, The axial drive component (7) is an electromagnetic drive device, and the armature disk (8) is a magnetically conductive material.

3. The disc-type permanent magnet coupler for a billet clamping and lifting device according to claim 2, characterized in that, The armature disk (8) is slidably connected by a guide (9), which has a plurality of guides evenly arranged around the armature disk (8) in a circumferential direction.

4. The disc-type permanent magnet coupler for a billet clamping and lifting device according to claim 1, characterized in that, The permanent magnet disk assembly (6) includes a permanent magnet rotor (601) and a connecting sleeve (602). The permanent magnet rotor (601) and the connecting sleeve (602) are detachably connected, and the connecting sleeve (602) is rotatably connected to the armature disk (8).

5. The disc-type permanent magnet coupler for a billet clamping and lifting device according to claim 4, characterized in that, Part of the connecting sleeve (602) extends into the armature disk (8). The outer wall of the connecting sleeve (602) and the inner wall of the armature disk (8) form a space for accommodating the bearing. The end of the connecting sleeve (602) is detachably connected to a first bearing end cap (11), and the end of the armature disk (8) is detachably connected to a second bearing end cap (12). The first bearing end cap (11) and the second bearing end cap (12) respectively limit the bearing axially.

6. The disc-type permanent magnet coupler for a billet clamping and lifting device according to claim 4, characterized in that, The permanent magnet rotor (601) includes a permanent magnet carrier disk (6011) and permanent magnets (6012) disposed on the permanent magnet carrier disk (6011). The permanent magnets (6012) have multiple pieces of circumferentially distributed and alternately arranged N and S poles around the permanent magnet carrier disk (6011).

7. The disc-type permanent magnet coupler for a billet clamping and lifting device according to any one of claims 1-6, characterized in that, The permanent disk assembly (6) is connected to the second shaft (4) via a spline structure; or the composite conductor disk (5) is connected to the first shaft (3) via a spline structure.

8. The disc-type permanent magnet coupler for a billet clamping and lifting device according to any one of claims 1-6, characterized in that, The composite conductor disk (5) includes a first conductor disk (501) and a second conductor disk (502) arranged in parallel. Relatively speaking, the first conductor disk (501) is made of a high conductivity material and the second conductor disk (502) is made of a low conductivity material to form a composite conductor disk.

9. The disc-type permanent magnet coupler for a billet clamping and lifting device according to claim 8, characterized in that, The first conductor disk (501) has a plurality of through holes evenly distributed along its circumference. The second conductor disk (502) is located on the side of the first conductor disk (501) away from the permanent disk assembly (6). The second conductor disk (502) is connected to a plurality of protrusions (503), which are embedded in the through holes of the first conductor disk (501).

10. The disc-type permanent magnet coupler for a billet clamping and lifting device according to any one of claims 1-6, characterized in that, The composite conductor disk (5) includes a first conductor disk (501). The first conductor disk (501) has a plurality of through holes uniformly arranged along the circumference. The through holes are embedded with protrusions (503). Relatively speaking, the first conductor disk (501) is made of a high conductivity material, and the protrusions (503) are made of a low conductivity material.

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